Watch Lorde perform ‘Hunger Games’ song on American Music Awards

Lorde debuted her new song, “Yellow Flicker Beat,” from the soundtrack to the new “Hunger Games” movie, “Mockingjay, Part 1″ at the American Music Awards on Sunday night. (Lorde curated that soundtrack, too.) She whips that hair back and forth, and — bonus! — her bff Taylor Swift makes a spirited dancing appearance in the audience around the 2:50 mark.